Reference: Prophets, False
Morish
These, at various periods in the history of Israel, appeared in large numbers: Ahab had 'about four hundred' of them. 1Ki 22:6. Such are described as speaking "a vision of their own heart, and not out of the mouth of the Lord." Jer 23:16. There were three that opposed Jeremiah to his face
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So Ahab called in the prophets, about four hundred of them, and asked them: Should I attack Ramoth, or not? They answered: Attack, Jehovah will give you victory.
This is what Jehovah of Hosts says: Do not listen to what the prophets are saying to you. They fill you with false hope. They speak about visions that they dreamed up. These visions are not from Jehovah.
That same year, in the fifth month of the fourth year that Zedekiah was king, Hananiah son of Azzur, a prophet from the town of Gibeon, spoke to me in the Temple. In the presence of the priests and of the people he told me
This is what Jehovah of Hosts, the God of Israel, says about Kolaiah's son Ahab and about Maaseiah's son Zedekiah, who prophesy lies to you in my name: 'I am going to hand them over to King Nebuchadnezzar of Babylon. I will kill them as you watch.
Watch out for the false prophets. They are disguised as sheep. But in their hearts they are vicious wolves.
Beloved, do not believe every spirit. Test the spirits to see whether they are from God. This is because many false prophets have gone out into the world.